Patents by Inventor Stephen H. Barkley

Stephen H. Barkley has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Wellhead connecting apparatus
    Patent number: 4688633
    Abstract: A coupling assembly for detachably connecting a pair of wellhead members, includes couplable first and second coupling members. Each coupling member has a central axial bore for accommodating a drill string, and each coupling member is adapted for axially aligned connection to a wellhead member. The first coupling member is axially rotatable relative to the second coupling member, into locking engagement therewith. The coupling also includes sealing means disposed between the coupling members, and means for rotating the first member relative to the second member.
    Type: Grant
    Filed: March 26, 1986
    Date of Patent: August 25, 1987
    Inventor: Stephen H. Barkley